Ecumenical Patriarch Antonios I

Ecumenical Patriarch Antonios I (780-21 January 837) was the Ecumenical Patriarch of Constantinople from 821 to 837, succeeding Ecumenical Patriarch Theodotos and preceding Ecumenical Patriarch Ioannes VII.

Biography
Antonios was originally an iconodule Orthodox Christian, but he later converted to iconoclasm, and Michael II of Byzantium appointed him as the Patriarch of Constantinople. He reigned until his death in 837 from a wasting disease.